Directly synthesized silver nanoparticles on gas diffusion layers by electrospray pyrolysis for electrochemical CO2 reduction

Title
Directly synthesized silver nanoparticles on gas diffusion layers by electrospray pyrolysis for electrochemical CO2 reduction
Authors
주오심채상윤이시영
Issue Date
2019-04
Publisher
Electrochimica acta
Citation
VOL 303-124
Abstract
Recently, the electrochemical CO2 reduction has been intensively researched for high selectivities and stabilities. The performance of electrochemical CO2 reduction can be restricted by mass transfer limitation from the low concentration of CO2(aq). Therefore, CO2 reduction systems with gas diffusion electrodes (GDE) have been suggested. CO2 reduction catalysts based on metals have been prepared primarily by a top-down approach from metal foil, which is not suitable for a gas diffusion reactor. In this study, nano-sized silver particles were deposited on a GDE of carbon paper by electrospray pyrolysis without additional immobilizing or annealing steps. The silver nanoparticles on carbon paper show the very high CO faradaic efficiency of 92%, the overpotential improved by ∼200  mV, and the good stability for 10  h. The CO2 activity of the Ag particles is strongly depended on precursor types of silver (silver acetate) for the electrospray pyrolysis. Lastly, the GDE prepared by electrospray pyrolysis have been used for a two-electrode gas diffusion flow cell for CO2 reduction.
URI
http://pubs.kist.re.kr/handle/201004/69087
ISSN
0013-4686
Appears in Collections:
KIST Publication > Article
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